Josh Radnor Ted Mosby Actor Jason Segel Marshall Erikson Actor Neil Patrick Harris Barney Stinson Actor Alyson Hannigan Lily Aldrin Actor Cobie Smulders Robin Sherbatsky Actor Bob Saget Narrator Michael Trucco Nick Petteruti Guest Star Ashley Williams Victoria Guest Star Vanessa Lee Chester Mia Guest Star Nikki Grier Singer 3 Guest Star Amanda Reed Peg Guest Star Carter Bays Executive Producer Craig Thomas Executive Producer Kourtney Kang Writer Pamela Fryman Director